We can't explain the universe, just describe it; and we don't know whether our theories are true, we just know they're not wrong. >Harald Lesch

Those kind of tests imply (some even explicitly state it) that if the situation described doesn't fit your circumstances that you imagine yourself how you'd react in them. Similar how you can replace the reading book hobby with playing video games.

I got INTP: Introvert(78%) iNtuitive(34%) Thinking(38%) Perceiving(3%)J/P were basically even, apparently. I think I identify more with the INTP description more, but the INTJ describes some social/interpersonal things which are totally absent in the INTP description. xD

I agree with Ex, but I tried to generalize some of those questions (like "reading a book" to mean any thoughtful solitary activity, such as a video game).